Tool device



Nov. 4, 1941. w. BLAIR 2,261,134

TOOL DEVICE File July s1, 1959 2 sheets-sheetv 1 W. BLAIR TOOL DEVICE Nov. 4, 1941.

2 sheets-sheet 2 Filed July 31, 1939 NON` Snventor PaiemedNov. 4, 1941 .UNITE STATES PATENT OFFICE 2,261,134 Toor. DEVICE walter Blair; nea-oit, Mich. Application July s1, 1939, serial No. 287,454

1s claims. (C1. 1li- 162) This invention relates, in general, to tools and, in particular, to a new and improved screw driver of the automatic type.

One'of the objects of this invention is to provide a new ,and improved screw driver which is charged and driven automatically and which is easily and faultlessly operable. y

Another object is to provide a new, and improved automatic screw driver which, after the initial positioning of its parts for proper operation, will operate over long perods of time without need for further adjustment regardless of the output required thereof. Another object herein is to provide a new and improved arrangement of the parts or elements of an automatic screw driver whereby the operation is'mcre eliicient than heretofore and the results therefrom of an improved nature.

Another object is to provide a new and improved screw driver which is automatic in its feeding or charging operations and in its driving operations and wherein said operations are so inter-dependent and so inter-related as to eliminate any possibility of jamming or otherwisel disabling the device.

driver.

Other objects and advantages of the invention will become readily apparent from a reference to the following specification taken in conjunction with the accompanying drawings of which there are two (2) sheets and wherein:

Figure 1 is a plan view `of the screw driver and showing the position of its parts at the end of a screw driving operation, same being partly broken away and in section to illustrate more clearly some of the details of construction;

Fig. 2 is a vertical view of the showing in F'g. 1, same also being partly broken away and in section for the same reasons as above;

. Fig. 3 is a View similar to Fig. 2 but showing the parts of the screw driver in a different positicn, a position whereat the screw and driver are ready for inter-engagement and ejection from 'the barrel enclosing them;

Fig. 4 is an elevational view of the working end of the screw driver` in the position thereof as shown in Fig. 2;

Fig. 5 is a section taken along the lines 5-,'5

in Fig. 2; and

Fig. 6 is a detailed section of the working end of the screw driver and showing the lrelative position of the parts thereof as they appear in a position intermediate the two positions shown in Figs. 3 and 2.

YThe portable, automatic screw driver shown I in the figures comprises, in part, a pair of casings, generally indicated at Il! and I2 and selectively movable relatively to each other for adaptingv the tool for activity or inactivity, casing Ill serving to provide, among other things, supports for the' prime mover and magazine, andV casing I2 serving ,to provide, among other things, a barrel for theV screws and screw driver and a support for the feed mechanism. To allow for the above mentioned relative movability of the casings I0 and I2, there is provided a pair of elongated guide rods I4 and I6, said rods being stationarily anchored at one end of each thereof to a lower portion I1 of the casing I0 and extending forwardly in spaced parallelism therefrom through a pair of guide bores I8 provided therefor in a 1ow^er\pgrtion I9 of the casing I2 located at the rear of\the latter, whereby and wherealong said casings are selectively movable toward and from one another. This movability of the casings IU and I2 1s selectively eiectuated by means of a handle member 20 which is xed to or formed integrally with the under-side of the portion I9 of said casing I2 and preferably extends rearwardly therefrom for a substantial distance in order to provide easy accessibility thereto in any relative ypositioning of said casings,

A screw driver element, generally indicated at 26, is provided and is adapted for being supported simultaneously by both of the casings I0 and I2, the forward or driving end of said element being carried within a barrel or bore 28 formed in and through said casing I2, and the rearward or driven end of said element being carried within a clutch housing 30 secured to or formed integrally with said casing I0. The element 26 may be an integral unit or it` may, for reasons of replacements and assembly of parts, be comprised of separate units, as shown, but, at any rate, said. element includes an elongated screw-driving head member 3l extending into the barrel 28, a length 32 of polygonal cross section preferably integral with said member 3l or at least being movable rotatably and longitudinally therewith, a sleeve 34 of internal cross section complementary to said polygonal cross section of said length 32 for rotating with said member 3| and said length 32 and being preferably adapted in any Well known manner for longitudinal movement therewith, a jaw clutch member 36 integral with or fixed to the rear end of said sleeve 34 or at least being rotatably and longitudinally movable therewith and arranged within the housing 30 with its jaw clutch face facing the opposite side of said housing, and a shaft 38 fixed to or integral with said clutch member 35 or at least being operable for rotatable and longitudinal movements therewith and extending therefrom longitudinally through said housing.

' The end of the screw driver element 26 opposite the driving end thereof, that is, the shaft 36, extends into abutting relationship with a spring 46 housed within an axial bore 42 of the drive shaft 44 of a prime mover, such as a motor 46, said prime mover being supported in any well known manner on and by the casing |6 so that said drive shaft may receive said other shaft in the manner described. It goes without saying, then, that the spring 40 urges unitary, longitudinal movement of the members 38, 36, v34, 32 and 3| ofthe screw driver element 26 forwardly, that is, in the direction of the casing l2, and it is pointed out that such movement is limited by means such as the engagement of the forward face of the clutch member 36 and the inner face of the forward wall of the housing 30, as shown in Fig. 3 and as compared with Fig. 2.V

The structure for selectively rotating the screw driver element 26 may be any one of several forms or combinations thereof, so that the one shown and herebelow describedis simply illustrative and, therefore, replaceableV at will.v The end of the drive shaft 44, which is tubular because of the bore 42 which receives the spring 40 and shaft 36, is provided with a collar 48, a slip clutch unit 50-52 of any well known construction and design, and a spring 54 arranged between said collar and said clutch unit. The collar 4B may be rotatable with the shaft 44 or it may be nonrotatable, but, at least, it has no'axial movement relatively thereto. The slip clutch unit 50-52 has one of its elements, D, rotatable with the shaft 44 and connected thereto for movement therealong and the other of its elements, 52, mounted on said shaft freely as far as-rotation therewith is concerned but being prevented in any well known manner from axial movement therealong, said element 52, in addition to comprising one of the two elements of the slip clutch 56-52, also comprises one of the two elements of a4 jaw clutch 3652. It will be understood that longitudinal movement of the screw driver element 26 in the direction of and relatively to the casing I0 (by means which will be presently described) engages the jaw clutch unit 36`52 against the force of the spring 46 and causes said elementlto be rotatably driven thereupon, and it will be seen that, in the event of an excessive or abnormal load on said element, the member 52 of the slip clutch unit 50-52 will slip relatively to the mem ber 50 of said latter unit and thereby avoid damage to the device, said member 50 opposing the spring 54 to permit such slippage.

Before describing the means by which the screws are charged or fed into the barrel 26 ahead of the screw driver element 26, the means by which the aforementioned longitudinal movement of said element in the direction of and relatively to the casing I0 will beherewith described. On the upper and lower walls ,of the casing I2 there isarranged a pair of leaf springs 56 and 58, said springs being anchored at their rear ends to portions of said walls substantially spaced from the front end of said casing and extending over said front end whereat said springs have secured thereto opposed Jaws 60 and 62. In the normal positions of the springs 56 and 58, the laws 60 and 62 lie on opposite sides of the central axis of the barrel 28 and equally spaced therefrom immediately adjacent the end thereof, said jaws defining a passageway coaxially aligned with said central axis and having a cross sectional area adapted to receive and align the stem of said screw but to oppose the extrusiontherethrough o f the screw head. The axial length of the jaws 60 and 62 is preferably less than the length of the screw stem so that, before complete extrusion of the screw from the passageway formed by said jaws, the jaws may aid in aligning the outer end of the screw with the work into which it is to be driven. Assuming that a screw 64 is in the barrel 23 between the outer end thereof and the driving end member 3| of the element 26 (which is the condition, as in Fig. 3, when the casings I6 and I2 are fully separated), a pull on the handle 20 until the space between said casings is reduced to an'extent whereat the actual end of said member 3| has driven the screw stem between and through the jaws 66 and 62 and the screw head into abutment with said jaws (as is the condition A in Fig. 6) will not cause longitudinal movement ofsaid element 26 in the direction of and relatively to the casing l0 to engage the jaw clutch 36-52. But, as soon as the member 3| is subjected to the pressure caused by the opposition of the resiliently supported jaws 60 and 62 while passing the screw head therethrough by an increased pull on the handle 26, the element 26 will be forced backwardly so as to engage the jaw clutch 36--52 whereupon, if the prime mover -46 is then operating or caused to be operated, said element 26 will be rotated. Though means for selectively controlling the operation and inoperation of the prime mover 46 have not been shown, itis to be presumed that such means are provided and are of any conventional type.

It may be desirable to rely entirely upon the pressure caused by the spring impressed jaws 66 and 62 and the resulting opposition to the extrusion of the screw 64 from the passage formed thereby to inter-engage the jaw clutch members 36 and 52, or it may be desirable to supplement the effectiveness thereof by providing other means, such means possibly taking the form of an abutting engagement between the end of the sleeve 34 and the forward wall of an enlargement 66 provided in the casing l2 at thel rear end of the barrel 28 and effective upon the bringing together of the casings l0 and I2. It will be noted, however, that Fig. 2 does not show such an abutting relationship because it has been found that the effectiveness of the spring impressed jaws'60 and 62 is sufcient for the results desired.

To a side of, preferably, the lower portion I9 of the casing l2 there is pivotally mounted, intermediate its ends and for movement about a transverse axis, a lever 68 the lower end of which is connected to a driver therefor, such as a rod 10 which is carried by and movable with said casing and extends longitudinally fora substantial distance in either direction from said lever. The connection between the lever 68 and its driver 'i6 may be rigid, but it has been found preferable to provide a pin and slot connection 'l2-13 therebetween so that said driver may remain at a constant level during the swinging thereby of said lever, this provision simplifying the construction of the device and enabling the casing I8 to serve as a stop', such as at 14, forthe rear end of said driver and a lug 'I6 carried onthe adjacent guide rod I6 to serve as a stop forvthe forward end of said driver. If the relationship of thev casings I8 and I2 is .changed from that shown in Fig. 2 to that shown in Fig. 3, just prior to the completion of the change the driver I8 will engage the stop 16 and the balance of the relative movement of said casings will effectuate the swinging of the lever 68 from that position thereof shown in Fig. 2 into that position thereof shown in Fig. 3. On the other hand, if the relationship ofthe casings I8 and I2 is changed from that position shown in Fig. 3 to that vposition shown in Fig. 2, just vprior to the completion of the change the driver 18 will engage the stop I4 and the balance of the relative movementl of said casings will effectuate the swinging of the lever^68 from that position thereof shown in Fig. 3 into that position thereof shown in Fig. 2.

The free end of the lever 68, while attaining one of its limit positions, serves to introduce one of the screws 64 into the barrel 28 ahead of the screw driver element 26 and, while attaining the other of its limit positions, serves to release another screw from the magazine (to be described) for subsequent discharge into said barrel. To accomplish the first of these purposes the lever 68, at its free end, carries a pin .18 about which is pivotally mounted an arm 88, said arm preferably having a substantial axial'bearing on said pin for maintaining the coincidence of the axis of said pin and the pivotal axis of said arm, and a spring 82 is arranged about said pin between said arm and a head 84 forfsaid pin for constantly urging said arm along' said pin away from said head and toward the casing I2. 'I'he arm 88 is provided with a driving element 86 which extends laterally therefrom in the direction of' the casing I2 and is received within an inclined slot 88 formed in the side wall of said casing. The slot 88 is in communication with and extends in the direction of an inclined chute orl bore 98 provided in the casing I2said chute or bore being open at'its rearward end and in communication at its 'forward end with the barrel 28. Naturally, the pivotal connection between the lever 68 and the arm 88 permits the element 86 to follow the slot 88 during the pivotal movementgof said lever, and thespring 82 constantly holds said element in its innermost position with respect to said slot. The forward and lower end of the slot 88 may by itself provide`a stop for the forward travel of the element 86 (upon the separation of the casings I8 and I2), or there may be provided, as shown in Fig. 3, a slight spacing between said forward and lower end and said element so that means, such as an abutting engagement between the lug 'I6 and the lower portion I9 of the casing I2, would have to be relied upon` to determine the actual distance the casings I8 and I2 may be moved apart. The wall of the casing I2 in which the slot A88 is formed is pro vided with a short, inclined track 92 which merges past the end of the track 92, but it has been found simplest to ,permit an abutment between the casing I2 and the magazine (to be described) to perform this function. `It will be seen, then, that forward movement of the arm 88 from the position shown in Fig. 2 to the position shown in Fig. 3 causes the element 86 to force the screw 64 directly thereahead and residing in the chute 98 into the barrel 28, and that rearward movement of said arm from the position shown. in Fig. 3 to the position shown in Fig. 2 repositions said element upon the track 92 for permitting the passage therepast of another screw. Y

For opposing free passageof that screw which is in the chute 98 and ahead of the element 86 into the barrel 2,8, there is provided a stop mem- A ber 94 which is normally carried over the forward end of said chute on the free end of a leaf spring i 96 anchored to the casing I2 below the spring 56. When the casings I8 and I2 are being separated and the forward end of the driver 'I8 engages the stop 16, the lever 68 is swung about its pivot and the arm 88 is driven forwardly, the element 86 driving the screw 64 thereaheadand in the chute 98 in opposition to and past the member 94 into the barrel 28. When .the casings I8 and I2 are then `brought togetherA to drive home the above mentioned screw, the engagement of thek driver 18 and the stop. 14 swings the lever l 68 back until the element 86 is upon the track 92, prior to which the spring 96 returns the member 94 into position for closing off the forward end of the chute 98 and preventing the next screw from passing thereby.

The casing I8 has secured thereto or formed integrally therewitha magazine support 98 which extends above the clutch housing 38 `and adk justably carries ay magazine |88 hav/ing an elongated bore |82 in which is stored a pluralityof the screws 64, said magazine extending forwardly from said support to substantially a position of abutment with the rear of .the casing I2 when said casings are in the position shown in Fig. 2,

and the axis of said bore having an angle of in` lever |88 is pivotally connected, intermediate its f ends, to and between the brackets |86, said lever extending in the direction of the length of the magazine |88 and being provided at its forward end with a laterally extending arm ||8 and at its rearward end ywith a rearwardly extending leaf spring .II2, said spring at its free Lend eninto said slot at the rearward and upper end of l gaging the adjacent wall of said magazine to urgev` the forward end of said lever toward Asaid magazine and the rearward end away therefrom, On either side of the pivotal axis of the le'ver |88, on the side adjacent Athe magazine |88, there is `carried :by the former a stop pin I I4 and said tures m4 in the magazine Ion is-substantiauy `equal to the length of one of the screws 64 so "that, vwhen the lever |88 is in its normalposition, such as is shown in Fig. 3, the two stop pins III will directly underlie the heads of the two forwardmost screws in the bore |02. Furthermore, the length of each of the stop pins IM is such that, when the lever |08 is shown in the position thereof in Fig. 3, the forward stop pin I I4 will be in projected position through its aperture |04 up against the forward face of the head of the first screw in the bore I02,`,and the rearward stop pin II4 will be projected into its aperture yIII but will be residing externally of said bore and directly below the head of the next screw in line. Therefore, movement of the lever |08 in a direction opposed to the spring II2 will y draw the forward pin II4 from the screw 6I being held thereby and permit it by gravity to pass along the bore |02, and simultaneously the rearward pin II4 will be projected into said bore up against the forward face of the screw head thereabove to prevent its downward movement along said bore until said lever is restored to its normal position.

IThe means for moving the lever |08 in opposition to the spring I I2 comprises an arm I8 which is secured to or formed integrally with the upper end of the lever 88 and extends rearwardly therefrom to engage the lever arm IIO and actuate the lever |08 upon or slightly before the positioning of the casings I0 and I2 as they are shown in Fig. Z.

When the casing I2 is moved forwardly from the position thereof shown in Fig. 2, the arm IIS is drawn off the arm IIO and the spring II2A forces the forward end of the lever |08 upwardly toward the magazine |00, the rearward pin III being 4withdrawn from the bore |02 to release the screw 64 being held thereby and the forward pin I I4 being projected into said bore to catch said screw, the remaining screws in said bore following said screw downwardly. Then, when and after the rod 10 engages the stop "I8, the driving element 88 leaves the camy or track 92, enters the bore 90 through the slot 88', pushes the screw 64 thereahead against the stop member 98, and causes the latter to raise and permit said screw to fall into the barrel 28 ahead of the driving end 3| of the screw driver element 28, said barrel having been cleared for said screw simply by the protraction of the casing I2 relatively to said screw driver element. It is upon the engagement of the rod 10 and stop 18, or slightly thereafter, that the clutch 88-82, 50 is disengaged.

In order to drive the screw 84 into the work and now residing `in the barrel 28, the casing I2 is moved rearwardly toward the casing I0, an i early phase of this movement causing said screw to be positioned by the screw driver element 28 as is shown in Fig. 6. The position of thev elements shown in Fig. 6 is reached before the rod 'I0 strikes the stop 'Il and is characteristic of the beginning of the engagement. of the clutch 88-52, 80. Further rearward movement of the casing I2 with respect to the casing I8 causes the then rotating element 28 to p'ush the screw 8l (which is residing in the barrel 28 between the spring impressed jaws 80 and 82) past said jaws 'and drive said screw home into the work. Si-

element 88, and up against the stop 84. Thereafter, the cycle is repeated.

Although the invention has been described with some detail it is not intended that such des'cription is to be definitive of the limits of the inventive idea. The right is reserved to make such changes in the details of construction and arrangement of parts as will fall within the purview of the attached claims. l

What I claim is:

1. In a portable tool device, a head member having a barrel therethrough and a bore inclined l to said barrel and in communication therewith, a supporting member for said head member and having an elongated storage chamber inclined similarly as said bore, an elongated implement carried by said barrel and said supporting member, said members being movable' relatively to each other and to said implementinto a limit position whereat said implement is in a retracted position within said barrel and said bore and said chamber are in a' position of spaced parallelism,

said members also being movable relatively to each other and to said implement into another limit position whereat said implement is in a position protracted from said barrel and said bore and said chamber are in a position of acljacency and alignment, a lever pivotally carried by said head member, said lever having an element extending laterally into said bore and being movable therealong with said lever, driving means for said lever to position said element adjacent the lower end of said bore when said inembers are at said iirst limit position therefor and to position said element adjacent the upper end of said bore when said members are at said second limit position therefor, and. means operable when said members are at one of said positions for moving said element laterally outwardly from the path of a fastenermeans traversable through said bore. ,v

2. In a portable tool device, a head member having a barrel therethrough and a bore inclined to said barrel and in communication therewith, a supporting member fory said head member and having an elongated storage chamber inclined similarly as said bore, an elongated implement carried by said barrel and said supporting member, said membersbeing movable relatively to each other and to said implement into a limit position whereat said implement is in a retracted position within said barrel and said bore and said chamber are in a position of spaced parallelism, said members also being Vmovable relatively to each other and-to said implement into another limit position whereat said implement is in a position'protracted from said barrel and said bore and said chamber are in a position of adjacency and alignment, a lever plvotally carried by said head member, said lever having an element extending laterally into said bore and being movable therealong 4with said lever, driv- V ing means for said lever t'o position said element adjacent the lower end of said bore when said members are at said first limit position therefor second lever to move said second element out of said chamber when said members arrive at said second limit position and to permit the return of said second element into said chamber when said members leave said second limit position.

3. In a portable tool device, a head member having a barrel therethrough and a bore inclined to said barrel and in communication therewith, a supporting memberfor said head member and vhaving an elongated storage chamber inclined similarly as said bore, an elongated implement carried by said barrel and said supporting member, said members being movable relatively to each other and to said implement into a limit position Whereat said implement is ina retracted position within said barrel and said bore and said chamber are in a position of spaced parallelism, said members also being movable relatively to each other and to said implement into another limit position whereat said implement is in a position protracted from said barrel and said bore and said chamber are in a position of ad- ,the path of a fastener means traversable through said bore, a second lever pivotally` carried by said supporting member and having an element laterally and alternately extensible into and out of said chamber, said first lever actuating said second lever to move said second element out of said chamber when said members arrive at said second limit position and to permit the return of said second element into said chamber when said members leave said second limit position, and a spring for positively returning said second element into said chamber.

4. In a portable tool device, a head member having a barrel therethrough and a bore inclined to said barrel and in communication therewith, a supporting member for said head member and having an elongated storage chamber inclined similarly as 'said bore, an elongated implement carried by said barrel and said supporting member, said members being movable relatively to each other and to said implement into a limit position whereat said implement is in a retracted of a fastener means traversable through said bore. and a second lever pivotally carried intermediate its ends by said supporting member and having a pair of elements arranged thereon forwardly and rearwardly of its pivotal axis, said elements of said pair being laterally and alternatelyextensible into said chamber and laterally and alternately extensible out' of said chamber upon the actuation of said second lever, said first lever actuating said second lever to move said forward element out of said chamber and said rearward element into said chamber when said members arrive at said second limit position and to permit the movements of said rearward element out of said chamber and of said forward element into said chamber when said members leave said secposition within said barrel and said bore and said chamber are in a position of spaced parallelism, said members also being movable relatively to each other and to said implement into another limit position whereat said implement is in a position protracted from said barrel and said bore and said chamber are in a position of adjacency and alignment, a lever pivotally carried by said I Y limit position therefor,.means operable when said members'areat one of said positions for moving said element laterally outwardly from the path ond limit position.

5. In a portable tool device, a head member having a. barrel therethrough and a bore inclined to said barrel and in communication therewith., a supporting member for said head member and having an elongated storage Achamber inclined similarly as `said bore, an elongated implement carried by said barrel land said supporting member, said members being movable relatively to each other and to said implement into a limit position whereat said implement is in a retracted position within said barrel and said bore and said chamber are in a position of spaced parallelism, said members also being movable relativeh7 to each` other and to said implement into another limit position whereat saidl implement is in a position protracted from said barrel and said bore and said chamber are in a position of adjacency and alignment, a lever pivotally carried by said head member, said lever having an element extending laterally into said bore and being -movable therealong with said leverI driving means for said lever to position said element adjacent the lower end of said bore when said members.

are at said first limit, position therefor` andl'to position said element adjacent the upper end of said bore when said members are at said 'second limit position thereforgmeans operable when said members are at one of said positions for moving said element laterally outwardly from the path of a fastener means traversable through said bore, a second lever pivotally carried intermediate its ends by said supporting member and having a pair of elements arranged thereon forwardly and rearwardly of its pivotal axis, said elements of said pair being laterally and alternately extensible into said chamber and laterally andalternately extensible out of said chamber upon the actuation of said second lever, said rst lever actuating said second 'lever to move said forward element out of said chamber and said rearward element into said chamber when said members arrive at said second limit position and to permit the movements of said rearward element out of said chamber and of said forward element into said chamber when said members leave said second limit position, and a spring for normally urging said forward element into said chamber and said rearward element out of said chamber. l

6. In a portable tool device, a head member having a barrel therethrough and a bore inclined to said barrel and in communication therewith, a supporting member for said head member and having an elongated storage chamber vinclined similarly as said bore, an elongated implement carried by said barrel 'and said supporting member, said members being'movable relatively to each other and to said implementinto a limit position whereat said implement is in a retracted position within said barrel and said bore and said chamber are in a position of spaced parallelism. said members also being movable relatively to each other and to said implement into another limit position whereat said implement is in a position protracted from said barrel and said bore and said chamber are in a position of adjacency and alignment, a lever pivotally carried by said head member, said lever having an element extending laterally into said bore and being movable therealong with said lever, a cam externally of said bore, and driving means for said lever to position saidelement adjacent the lower end of said bore when said membersare at said first limit position therefor and to position said element adjacent the upper end of said bore and engage same with said cam when said members are at said second limit position therefor, said cam being operable when said members are in one of said positions for urging said element laterally outwardly from the path of a fastener means traversable through said bore.

7. In a portable tool device, a head member having a barrel therethrough and a bore inclined to said barrel and in communication therewith, a supporting member for said head member and having an elongated storage chamber inclined similarly as said bore, an elongated implement carried by said barrel and said supporting member, said members being movable relatively to each other and to said implement into a limit position whereat said implement is in a retracted position within said barrel and said bore and said chamber are in a position of spaced parallelism, said members also being -movable relatively to each other and to said implement into another limit position whereat said implement is in a position protracted fromi said barrel and said bore and said chamber are in a. position of adjacency and alignment, a lever pivotally carried by said head member, said lever having an element extending laterally into said bore andbeing movable therealong with said lever, a cam extemal1y formed on said head member adjacent the upper end of said bore, driving means for said lever to position said element adjacent the lower end of said bore when said members are at said first limit position therefor and to cause engagement between said element and said cam to position said element externally of and adjacent said upper end of said bore when said members are at said second'iimit position therefor, and a second lever pivotally carried by said supporting member and having an element laterally and alternately extensible into and out of said chamber, said rst lever actuating said second lever to' move said second element out of said chamber whenl said members arrive at said second limit position and to permit the Ireturn of said second element into said chamber when said members leave said second limit position.

8. In a tool device, a casing formed with a pair of intercommunicated passageways, one of said passageways being operable for supporting a tool for rectilinear movement relatively thereto between a pair of limit positions, the other of said passageways being operable for supporting an attachment means, stop means normally extending into said other passageway for opposing movement of the attachment means therepast, and feeder means operable responsive to relative movement of said casing and tool from one of said positions to the other independently of said between a pair of limit positions, the other of stop means for ineiectuating the latter and forcing the attachment means therepast.

9. In a tool device, a casing formed with a pair of intercommunicated passageways, one of said passageways being operable for supporting a tool for rectilinear movement relatively thereto between a pair of limit positions, the other of said passageways being operable for supporting an attachment means, resiliently supported stop means normally extending into said other passageway ahead of the attachment means therein for opposing movement of the latter therepast from said other passageway into said one passageway, and feeder means operable responsive to relative movement of said casing and tool from one of said positions to the other independently of said stop means for overcoming the resiliency of the latter 'and forcing the attachment means therepast.

l0. In, a tool device, a casing formed with a pair of intercommunicated passageways, one of saidfpassageways being operable for supporting a tool for rectilinear movement relatively thereto said passageways being operable for supporting an attachment means, an elongated opening formed in said casing in communication with said other passageway, stop means normally extending into said other passageway for opposing movement of the attachment means therepast, and feeder means extending throughsaid opening and operable responsive to relative movement of said casing and tool from one of said positions to the other independently of said stop means for ineffectuating the latter and forcing the attachment means therepast.

ll. In a tool device, a casing formed with a pair of intercommunicated passageways, one of said passageways being operable for supporting a tool for rectilinearmovement relatively thereto between a pair of limit positions, the other of said passageways being operable for supporting an attachment means, an elongated opening formed in said casing in communication with said other passageway, resiliently supported stop means normally extending into said other passageway ahead of the attachment means therein for opposing movement of the latter therepast from said other passageway into said one pas- `sageway, and `feeder means extending through said opening and operable responsive to relative movement of said casing and tool from one of said positions to the other independently of said stop means for overcoming the resiliency of the latter and forcing the attachment means therepast.

12. In a tool device, a casing formed with a pair of intercommunicated passageways, one of said passageways being operable for supporting a tool for rectilinear movement relatively thereto between a pair of limit positions, the other of said passageways being operable for supporting a fastening means, stop means normally positioned forwardly of the fastening means for opposing movement of the latter therepast into said one passageway, lever means movable into a position rearwardly of the fastening means during and responsive to movement of said tool from one of said limit positions to the other and into a position forwardly of said first lever position during and responsive to movement of said tool from said other limit position to said one limit position, and feeder means carried by said lever means for movement therewith and cooperable with the fastening means during movement of pair of intercommunicated passageways, one of during and responsive to movement of said tool from one of said limit positions to the other and into a position forwardly of said first lever position during and responsive to movement of said tool from said other limit position to said one limit position, an opening formed in said casing opposite said other passageway and extending therealong, and feeder means carried by said' lever means for movement therewith and extending through said opening for cooperation with the fastening means during movement of said lever means from said 'first lever position to said second lever position to force the attachment means past said stop means into said one passageway ahead of said tool. i

14. In a tool device, a casing formed with a pair of intercommunicated passageways, ne of said passageways lbeing operable for supporting a tool for rectilinear movement relatively thereto between a pair of limit positions,'the other of said passageways being operable for supporting a fastening means, stop means normally positionedl forwardly ofthe fastening means for ,opposing movement of the latter therepast intosaid one passageway, lever means movable into a position rearwardly of the fastening means during and responsive to movement of said tool from one of said limit positions to the other and into al position'forwardly of said rst lever position during and responsive to movement of said tool from said other limit position to said one limit position, an Aopening formed in said casing opposite said `other passageway and extending therealong, and

feeder means carried by said lever means for movement therewith and extending through said opening for cooperation with the fasteningV means during movement ofv said lever means from said first lever position to said second lever position to force the attachment means past said stop means into said one passageway ahead of said tool, said feeder -means also being movable relatively to said lever means for permitting the former to follow said opening during movability thereof and of the former.

'15. In a tool device, a casing having a pair of intercommunicated passageways, one of said passageways being operable for supporting a tool for rectilinear movement relatively thereto between a pair of limit positions, the other of said passageways being operable for supporting a fas- ,tening means, stop means normally extending into said other passageway ahead of the fastening means for opposing movement of the latter therepast into said one passageway, lever means pivotally carried by said casing and movable into lfrom one of said limit positions to the other and into a lower position with respect to saidfother passageway responsive to movement of said tool from said other limit position to said one limit position, feeder means carried by said lever means for movement therewith and operable during movement from said upper position to said lower position for extending into said other passageway and forcing the fastening means past said stop means into said one passageway and upon movement from said lower position into said upper position for .being positioned externally of said other passageway, storage means, for other fastening means, and means operable respons'ive to assumption by said feeder means of said upper position forA controlling the discharge of the latter fastening means from said storage means into said other passageway.

16. In a tool device, a casing having a pair of intercommunicated passageways, one of said passageways being 'operable for supporting a tool for rectilinear movement relatively thereto between a pair of limit positions, the other of said pas- `sageways being operable for supporting a fastening means, stop means normally extending into said other passageway ahead of the fastening means for opposing movement of the latter therepast into said one passageway, levermeans' pivotally carried by said casing and movable into an upper position with respect to said other passageway responsive to movement of said tool from one of said limit positions to the other and other passageway, feeder means carried by said lever means for lmovement therewith and operable during movement from said upper position to said lower position for extending through said opening and forcing the fastening means past said stop means into said one passageway and upon movement from `said lower positionV into said upper position for being positioned externally of said opening, storage means for other fastening means, and means operable responsive to assumption by said feeder means of said'upper position for controlling the discharge of the latter fastening meansfrom said storage means into said other passageway.

- WALTER BLAIR. 

